
print("Hello World")

import os
def hostname():
    sys = os.name  

    if sys == 'nt':  
            hostname = os.getenv('computername')  
            return hostname  

    elif sys == 'posix':  
            host = os.popen('echo $HOSTNAME')  
            try:  
                    hostname = host.read()  
                    return hostname  
            finally:  
                    host.close()
    else:  
            return 'Unkwon hostname' 
                
print("The hostname is " + hostname())